73420780 has 48 divisors (see below), whose sum is σ = 160554240. Its totient is φ = 28179648.

The previous prime is 73420771. The next prime is 73420801. The reversal of 73420780 is 8702437.

It is a super-2 number, since 2×73420780² = 10781221871616800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50017 + ... + 51463.

It is an arithmetic number, because the mean of its divisors is an integer number (3344880).

Almost surely, 2^73420780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73420780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80277120).

73420780 is an abundant number, since it is smaller than the sum of its proper divisors (87133460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73420780 is a wasteful number, since it uses less digits than its factorization.

73420780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 73420780 is about 8568.5926499047. The cubic root of 73420780 is about 418.7353873270.

The spelling of 73420780 in words is "seventy-three million, four hundred twenty thousand, seven hundred eighty".